Compression structure, compressor and air conditioner with same

Abstract

The application provides a compression structure, a compressor and an air conditioner with the same. The compression structure comprises a cylinder, a sliding vane structure and a roller. The cylinder is provided with a sliding vane groove. The sliding vane structure is movably arranged in the sliding vane groove. The roller is movably arranged in the cylinder. The sliding vane structure abuts against the outer peripheral wall of the roller. The roller and the sliding vane structure divide the cylinder into a compression cavity and a suction cavity. The roller is provided with an openable and closable pressure relief passage. The pressure relief passage can guide the gas in the compression cavity into the suction cavity. The compression structure, the compressor and the air conditioner with the same can effectively relieve pressure in special cases and ensure stable flow output.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to a compression structure, a compressor, and an air conditioner having the same. BACKGROUND

[0002] At present, the pump body structure of a conventional rotary compressor is guaranteed to follow the reciprocating movement of the roller by the gas force and spring force of the tail of the sliding vane.

[0003] However, under the extreme non-steady state working condition caused by the change of the running ring temperature in the system, a large amount of liquid or mixed refrigerant is generated at the inlet end. Due to the incompressibility of the liquid, the gas pressure in the high-pressure cavity is increased, a high resistance is generated, the high resistance generated by compressing the liquid in the high-pressure cavity resists the above-mentioned gas force and spring force, and the impact of the strong liquid force can cause the pump body to stop / rotate reversely and cause fatigue damage or overload short circuit.

[0004] The compression structure in the prior art only has a conventional pressure relief passage of the exhaust port when encountering the above-mentioned situation, and the repeated impact at the movement dead point position of the compression structure can cause irreversible damage. Alternatively, the sliding vane structure is adopted, the sliding vane can be separated for a short time when the driving force is overloaded or the liquid force impact is too large, the low-pressure cavity and the high-pressure cavity are short-circuited for a short time to relieve pressure, and this can make the flow output unstable.

[0005] Therefore, how to provide a compression structure, a compressor, and an air conditioner having the same which can effectively relieve pressure under special conditions and ensure stable flow output has become a problem to be solved by those skilled in the art. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to provide a compression structure, a compressor, and an air conditioner having the same which can effectively relieve pressure under special conditions and ensure stable flow output.

[0007] In order to solve the above-mentioned problem, the present application provides a compression structure, comprising:

[0008] a cylinder, a sliding vane groove is arranged on the cylinder;

[0009] a sliding vane structure, the sliding vane structure is movably arranged in the sliding vane groove;

[0010] a roller, the roller is movably arranged in the cylinder; the sliding vane structure and the outer peripheral wall of the roller abut against each other; the roller and the sliding vane structure divide the cylinder into a compression cavity and a suction cavity; an openable and closable pressure relief passage is arranged on the roller; and the pressure relief passage can guide the gas in the compression cavity into the suction cavity.

[0011] Further, when there is liquid in the compression cavity, the pressure relief passage is opened, so that the pressure relief passage guides the gas in the compression cavity into the suction cavity.

[0012] Further, the first end and the second end of the pressure relief channel are located on the outer peripheral wall of the roller; in the preset state, the first end of the pressure relief channel is communicated with the compression cavity, and the second end of the pressure relief channel is communicated with the suction cavity.

[0013] Further, the compression structure further comprises a control mechanism, and the control mechanism comprises a movable structure; the movable structure blocks the pressure relief channel to be in a closed position, and opens the pressure relief channel to be in a communicated position; the movable structure is movable between the communicated position and the closed position to open and close the pressure relief channel.

[0014] Further, the control mechanism further comprises a control channel, and a first end of the control channel is communicated with the pressure relief channel; the movable structure is movably arranged in the control channel to move between the communicated position and the closed position to open and close the pressure relief channel.

[0015] And / or, the control mechanism further comprises a driving structure, and the driving structure is used to drive the movable structure to move between the communicated position and the closed position to open and close the pressure relief channel.

[0016] Further, when the control mechanism further comprises the control channel and the driving structure, a second end of the control channel is communicated with the high-pressure space; the gas pressure in the high-pressure space cooperates with the gas pressure in the compression cavity to form the driving structure; when the gas pressure in the compression cavity is greater than the gas pressure in the high-pressure space, the gas in the compression cavity pushes the movable structure to move to the communicated position to open the pressure relief channel; when the gas pressure in the compression cavity is less than the gas pressure in the high-pressure space, the gas in the high-pressure space pushes the movable structure to move to the closed position to close the pressure relief channel.

[0017] Further, the control channel is arranged on the roller, and a second end of the control channel is arranged on the inner peripheral wall of the roller to be communicated with the high-pressure space; the gas pressure in the high-pressure space is equal to the exhaust pressure of the compression structure.

[0018] Further, when the movable structure is located in the closed position, the movable structure divides the pressure relief channel into a compression section and a suction section, the compression section is communicated with the compression cavity, and the suction section is communicated with the suction cavity; a surface of the movable structure located in the compression section is a force receiving surface, and the force receiving surface and the cross section of the compression section have an included angle; when the control mechanism comprises the control channel, the force receiving surface and the surface of the compression section away from the control channel are arranged at an acute angle.

[0019] Further, the minimum included angle between the circumferential center line of the sliding slot and the suction port of the cylinder is h, and the minimum included angle between the circumferential center line of the sliding slot and the suction port of the cylinder is h'; when the control mechanism further comprises the control channel, the corresponding central angle between the circumferential center line of the control channel and the circumferential center line of the sliding slot is K; wherein K = h' ± (h'-h);

[0020] And / or, the control channel is arranged perpendicularly to the pressure relief channel.

[0021] And / or, the control channel is located at the center of the pressure relief channel.

[0022] Further, the pressure relief channel is located at one side of the sliding vane structure close to the cylinder suction port.

[0023] Or, both ends of the pressure relief channel are located at both sides of the sliding vane structure.

[0024] According to another aspect of the present application, a compressor is provided, comprising a compression structure; the compression structure is the compression structure described above.

[0025] According to another aspect of the present application, an air conditioner is provided, comprising a compressor; the compressor is the compressor described above.

[0026] The compression structure, the compressor and the air conditioner provided by the present application can effectively relieve pressure in special cases and ensure stable flow output. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of the compression structure in the first embodiment of the present application;

[0028] Figure 2 It is a structure schematic view of the cylinder structure in the first embodiment of the present application;

[0029] Figure 3 It is a structure schematic view of the sliding vane structure and the roller in the first embodiment of the present application;

[0030] Figure 4 It is an enlarged view of A in FIG. 1; Figure 3

[0031] Figure 5 It is a structure schematic view of the compression structure in the second embodiment of the present application;

[0032] Figure 6 It is an enlarged view of B in FIG. 2; Figure 5

[0033] 1, cylinder; 11, sliding vane groove; 12, cylinder suction port; 13, cylinder exhaust port; 2, sliding vane structure; 3, roller; 31, pressure relief channel; 4, control mechanism; 41, control channel. DETAILED DESCRIPTION

[0034] For reference Figures 1-6 ​​As shown, a compression structure includes a cylinder 1, a sliding vane structure 2 and a roller 3, the cylinder 1 is provided with a sliding vane groove 11; the sliding vane structure 2 is movably arranged in the sliding vane groove 11; the roller 3 is movably arranged in the cylinder 1; the sliding vane structure 2 abuts against the outer peripheral wall of the roller 3; and the roller 3 and the sliding vane structure 2 divide the cylinder 1 into a compression cavity and a suction cavity; the roller 3 is provided with an openable and closable pressure relief channel 31; the pressure relief channel 31 can guide the gas in the compression cavity to enter the suction cavity. The compression structure of the present application is an embedded roller 3, and the pressure relief channel 31 is added to the roller 3, which enhances the liquid compression capacity of the embedded pump body structure through the pressure relief channel 31, and in combination with the stable operation characteristics of the embedded structure, it is helpful to broaden the operation range of conventional single-stage compression, double-stage enthalpy increase and variable volume, and is more suitable for complex and variable application occasions.

[0035] The present application embeds the pressure relief structure in the embedded roller 3, so that the technology can actively relieve pressure to ensure normal operation when the liquid content in the compression cavity is large; after eliminating the defect that it cannot relieve pressure in extreme cases, the structure has the advantage that the sliding vane does not separate from the roller 3 during stable operation, compared with the conventional rotary structure, and the flow output is stable under low torque, low load or low back pressure. Combined with the unique double-stage enthalpy increase, three-cylinder double-stage variable volume and variable frequency variable volume technology of our company, a wider compressor operating range can be realized, while ensuring higher operating reliability and improving the use comfort of the product.

[0036] The embedded structure does not need to set a spring at the tail of the sliding vane to ensure the establishment of the starting pressure difference, and there is no separation during the movement process, compared with the movable structure mechanism of the conventional pump body.

[0037] The present application can relieve pressure in extreme conditions to ensure that the key components minimize irregular impact and balance the amount of incompressible liquid on the high and low pressure sides during non-steady state liquid compression, reduce mechanical fatigue and impact damage, and achieve stable operation and high reliability in each extreme temperature range. At the same time, the reduced pump body load fluctuation during stable operation helps to reduce bearing power consumption and improve input power smoothness, which can reduce the occurrence of abnormal sound and vibration on the mechanical level, and can reduce the overload and failure of power elements caused by short-term fluctuations in the input compressor power on the electrical level.

[0038] The present application sets multiple groups of pressure relief channels 31 with different angles and opening cross-sectional sizes in the roller 3, or can be used in combination with the channel in the present application, to achieve a wider pressure relief adjustment effect.

[0039] The application discloses a pump body structure with a sliding piece and a roller 3, wherein the roller 3 is embedded with a pressure relief mechanism, and is connected with high and low pressure cavities and an oil pool respectively. The pressure relief mechanism is provided with a spring tongue and a matching groove, and can open the channel connecting the high and low pressure cavities to achieve the pressure relief effect within the designed opening angle range according to the pressure difference between the high and low pressure cavities and the back pressure of the oil pool. In the starting stage, the pressure relief channel 31 is closed under the centrifugal force (or spring force), and in the running stage, the pressure relief channel 31 is closed under the centrifugal force (or spring force) and the back pressure after being opened, so that the self-opening and running of the mechanism are realized.

[0040] The application further discloses some embodiments. When there is liquid in the compression cavity, the pressure relief channel 31 is opened, so that the pressure relief channel 31 guides the gas in the compression cavity into the suction cavity. The pump body can be prevented from stopping and reversing due to strong liquid force impact, and fatigue damage or overload short circuit can be caused.

[0041] The application further discloses some embodiments. The first end and the second end of the pressure relief channel 31 are located on the outer peripheral wall of the roller 3. In the preset state, the first end of the pressure relief channel 31 is connected with the compression cavity, and the second end of the pressure relief channel 31 is connected with the suction cavity. The pressure relief channel 31 is a straight channel. A through hole is formed in the roller 3 to form the pressure relief channel 31.

[0042] The application further discloses some embodiments. The compression structure further comprises a control mechanism 4, and the control mechanism 4 comprises a movable structure. The movable structure is in the closed position when the movable structure blocks the pressure relief channel 31, and is in the connected position when the movable structure opens the pressure relief channel 31. The movable structure moves between the connected position and the closed position to open and close the pressure relief channel 31. The movable structure is a sliding block.

[0043] The application further discloses some embodiments. The control mechanism 4 further comprises a control channel 41, and the first end of the control channel 41 is connected with the pressure relief channel 31. The movable structure is movably arranged in the control channel 41, so that the movable structure moves between the connected position and the closed position to open and close the pressure relief channel 31. The length of the control channel 41 is L'.

[0044] The application further discloses some embodiments. The control mechanism 4 further comprises a driving structure, and the driving structure is used for driving the movable structure to move between the connected position and the closed position to open and close the pressure relief channel 31.

[0045] The application further discloses some embodiments, when the control mechanism 4 further comprises a control channel 41, the second end of the control channel 41 communicates with the high-pressure space; the gas pressure in the high-pressure space cooperates with the gas pressure in the compression cavity to form a driving structure; when the gas pressure in the compression cavity is greater than the gas pressure in the high-pressure space, the gas in the compression cavity drives the movable structure to move to the communication position to open the pressure relief channel 31; when the gas pressure in the compression cavity is less than the gas pressure in the high-pressure space, the gas in the high-pressure space drives the movable structure to move to the closed position to close the pressure relief channel 31. The control channel 41 is S3; the movable structure is in sliding sealing connection with the control channel 41, and gas leakage from the control channel 41 can be prevented. The compressor comprises a shell, and the high-pressure space is formed at an oil pool in the shell.

[0046] The application further discloses some embodiments, the control channel 41 is arranged on the roller 3, and the second end of the control channel 41 is arranged on the inner peripheral wall of the roller 3, so that the second end of the control channel 41 communicates with the high-pressure space; the gas pressure in the high-pressure space is equal to the exhaust pressure of the compression structure. The automatic starting and opening of the pressure relief channel 31 can be realized along with the operation of the compressor.

[0047] The application further discloses some embodiments, when the movable structure is located at the closed position, the movable structure separates the pressure relief channel 31 into a compression section and a suction section, the compression section communicates with the compression cavity, and the suction section communicates with the suction cavity; a surface of the movable structure located in the compression section is a force receiving surface, and an included angle is formed between the force receiving surface and the cross section of the compression section; when the control mechanism 4 comprises the control channel 41, an acute angle is formed between the force receiving surface and the surface of the compression section away from the control channel 41. The compression section is an S1 channel, and the suction section is an S2 channel. The pressure relief effect is achieved by adjusting the back pressure spring of the movable structure. The length of the force receiving surface is L.

[0048] The application further discloses some embodiments, the minimum included angle between the circumferential center line of the sliding vane groove 11 and the suction port of the cylinder 1 is h, and the minimum included angle between the circumferential center line of the sliding vane groove 11 and the suction port of the cylinder 1 is h'; when the control mechanism 4 further comprises the control channel 41, the corresponding central angle between the circumferential center line of the control channel 41 and the circumferential center line of the sliding vane groove 11 is K; wherein K = h' ± (h' - h). The pressure relief channel 31 can effectively relieve pressure in special cases, and the flow output is stable.

[0049] The application further discloses some embodiments, the control channel 41 and the pressure relief channel 31 are arranged to be perpendicular to each other.

[0050] The application further discloses some embodiments, the control channel 41 is located at the center position of the pressure relief channel 31.

[0051] Some embodiments of the present application are also disclosed, the pressure relief channel 31 is located on one side of the sliding structure 2 close to the air inlet of the cylinder 1; it can be set according to the h` angle following the opening angle of the exhaust valve, and the appropriate angle of the pressure relief opening is obtained through comprehensive calculation (usually the difference with the exhaust opening angle is not more than the air intake closing angle).

[0052] Some embodiments of the present application are also disclosed, the two ends of the pressure relief channel 31 are located on both sides of the sliding structure 2; the S1 channel and the S2 channel are set to always follow the air inlet and the exhaust port, and the pressure relief effect is achieved by adjusting the back pressure spring of the movable structure.

[0053] The chimeric pressure relief structure of the present application is located in the roller 3, which is connected to the air inlet channel S1 when the crankshaft eccentricity is rotated to the relative sliding center line h` angle, the exhaust cavity channel S2 when h` angle, and the channel S3 which is always connected to the relative movable area of the crankshaft roller 3. The three groups of channels are connected and only S1 and S2 are connected. The movable structure is provided in the connecting cavity, which is mainly composed of a slope towards the S2 channel and a shape perpendicular to the S1 and S3 channel axis direction. There is a cavity for the movement of the movable structure in the mutual area of the three groups of channels. The shape cooperates with the movable structure and meets the movement of the movable structure in the cooperating cavity along the S3 axis direction. The length of the sliding slope surface along the axis is greater than the total length of the moving stroke.

[0054] In the above pressure relief structure, S1, S2 and S3 are connected with the air inlet pressure, the compression cavity pressure and the oil pool pressure respectively. At h` moment, the last air intake cycle is completed and the volume compression process begins. At this moment, S3 is always high pressure, S1 is slightly higher than S2 due to the compression of the volume, and the movable structure closes the connecting channel under the pressure difference between S3 and S2, and the compression of the volume cavity proceeds normally. If the volume cavity is filled with liquid or gas-liquid mixture, the pressure at the S1 end will break through the limit of the S3 pressure during the gradual increase of h` due to the incompressibility of the liquid. The movable structure is reset to L` under the pressure, the connecting channel is connected to form pressure relief, and the movable structure is reset to block the connecting channel under the high pressure of S3 in a short time, realizing the action and reset of the pressure relief structure.

[0055] The key is that the h` angle needs to be determined according to the application occasion. For a conventional single-stage compression cavity, h` is greater than the opening angle of the exhaust valve, for a double-stage enthalpy-increasing low-stage compression cavity, h` can be appropriately smaller than the opening angle of the exhaust valve, and the structure is set according to different application scenarios and different intake liquid volume. The basic structure requires that h` is greater than the air intake opening angle h, and the S3 channel angle k on the roller 3 can be flexibly adjusted within the h` ± (h`-h) angle range.

[0056] The centrifugal force and inertia force running along with the roller 3 in the starting stage will drive the movable structure to close the communication passage, and the normal compression function of the volume cavity is not affected after the pressure relief passage 31 is closed. After the exhaust is completed, the inertia force will be replaced by the S3 connected to the high-pressure oil pool in the compressor shell to ensure the normal compression of the volume; or a spring can also be arranged in the S3.

[0057] According to another aspect of the present application, a compressor is provided, comprising a compression structure; the compression structure is the compression structure described above.

[0058] According to another aspect of the present application, an air conditioner is provided, comprising a compressor; the compressor is the compressor described above.

[0059] It is easy for those skilled in the art to understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0060] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A compression structure, characterized in that, include: Cylinder (1), wherein a sliding vane groove (11) is provided on the cylinder (1); A sliding structure (2) is movably disposed within the sliding groove (11); A roller (3) is movably disposed within the cylinder (1); a sliding vane structure (2) abuts against the outer peripheral wall of the roller (3); and the roller (3) and the sliding vane structure (2) divide the cylinder (1) into a compression chamber and an intake chamber; the roller (3) is provided with an openable and closable pressure relief channel (31); the pressure relief channel (31) can guide the gas in the compression chamber into the intake chamber; Wherein, the roller (3) is an interlocking roller that is fitted with the sliding plate structure (2); The first and second ends of the pressure relief channel (31) are both located on the outer peripheral wall of the roller (3); The compression structure also includes a control mechanism (4), which includes a movable structure, a control channel (41), and a drive structure; The pressure relief channel (31) is closed when the movable structure blocks it, and connected when the movable structure opens it; the first end of the control channel (41) is connected to the pressure relief channel (31); the second end of the control channel (41) is connected to the high-pressure space. The gas pressure in the high-pressure space and the gas pressure in the compression chamber work together to form the driving structure. When the gas pressure in the compression chamber is greater than the gas pressure in the high-pressure space, the gas in the compression chamber pushes the movable structure to the connected position to open the pressure relief channel (31). When the gas pressure in the compression chamber is less than the gas pressure in the high-pressure space, the gas in the high-pressure space pushes the movable structure to the closed position to close the pressure relief channel (31).

2. The compression structure according to claim 1, characterized in that, When there is liquid in the compression chamber, the pressure relief channel (31) opens so that the pressure relief channel (31) guides the gas in the compression chamber into the intake chamber.

3. The compression structure according to claim 1, characterized in that, In the preset state, the first end of the pressure relief channel (31) is connected to the compression chamber, and the second end of the pressure relief channel (31) is connected to the intake chamber.

4. The compression structure according to claim 1, characterized in that, The movable structure moves between the connected position and the closed position to open and close the pressure relief channel (31).

5. The compression structure according to claim 4, characterized in that, The movable structure is movably disposed within the control channel (41) so that the movable structure moves between the connected position and the closed position, thereby opening and closing the pressure relief channel (31).

6. The compression structure according to claim 5, characterized in that, The control channel (41) is disposed on the roller (3), and the second end of the control channel (41) is disposed on the inner peripheral wall of the roller (3) so that the second end of the control channel (41) is connected to the high pressure space; the gas pressure in the high pressure space is equal to the exhaust pressure of the compression structure.

7. The compression structure according to claim 5, characterized in that, When the movable structure is in the closed position, the movable structure divides the pressure relief channel (31) into a compression section and an intake section. The compression section is connected to the compression chamber, and the intake section is connected to the intake chamber. The surface of the movable structure located in the compression section is a force-bearing surface, and there is an angle between the force-bearing surface and the cross-section of the compression section. The force-bearing surface is set at an acute angle with the surface of the compression section away from the control channel (41).

8. The compression structure according to claim 5, characterized in that, The control channel (41) and the pressure relief channel (31) are arranged perpendicular to each other; And / or, the control channel (41) is located at the center of the pressure relief channel (31).

9. The compression structure according to claim 1, characterized in that, The pressure relief channel (31) is located on the side of the sliding vane structure (2) near the intake port of the cylinder (1); Alternatively, the two ends of the pressure relief channel (31) are located on both sides of the sliding plate structure (2).

10. A compressor, characterized in that, Includes a compression structure; the compression structure is the compression structure according to any one of claims 1-9.

11. An air conditioner, characterized in that, Includes a compressor; the compressor is the compressor described in claim 10.

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